Anyone here tried loading 62gr SS109 bullets in a 22-250 bolt gun? What is your best accuracy with these bullets?
Quote from: VaWolf on November 12, 2009, 10:35:07 PM
Anyone here tried loading 62gr SS109 bullets in a 22-250 bolt gun? What is your best accuracy with these bullets?
Not tried it yet...most 22-250's are slow twist, like 1:12...not sure how well they'll stabilize a 62 grainer. I've only loaded 55 gr and lighter in 22-250. Let me know what kinda results you get. Might wanna test your barrel twist first.
-David
Edgewood, NM
Most factory 22-250's will have 1-14 twist.
Savage had a model out this year that was 1-8.
Years ago a freind had a Rem 700 22-250 it fired Nosler 60 grain solid base bullets with great accuracy. The solid base was discontinued and replaced by the ballistic tip line of bullets.
I own a cobbled together 22-250 bolt gun with 1-8 twist, it is very happy squirting 75 gr A-Max's @ 3400
The SS109 did not stabilize in a 1-12 twist in a M16A1 barrel with a standard loading. Pappy
First off, it isn't the weight, it's the length.
A Rem 788 in 22-250 will stabilize the 63 gr Sierra bullet, but it's a flat base. I'll wager 64 gr Winchester flat base's will too.
Now, it's kind of iffy here.
http://www.exteriorballistics.com/reference/pdf/Twist%20Tables_Rifle.pdf (http://www.exteriorballistics.com/reference/pdf/Twist%20Tables_Rifle.pdf)
Quote22-250 Remington - 1 in 12" . . .Sako; Savage 110, 112; Thompson/Center Rifle
22-250 Remington - 1 in 14" . . .Browning; Remington 700,788, 40-XB; Savage
99, 110, 112-V; H&R; Husqvarna; Ruger;
Winchester 70, 770; Mossberg;Weatherby;
Sako current models
12" twist MIGHT stabalize 62 gr boat tails (if you push it fast enough), but, 14" twist almost certainly won't, at least won't reliably.
I did some further research into this.
Didn't find anything on 62 gr boat tails, did find info on 69-70 grain bullets. Remember, length, not weight (actually ballistic coefficient, which is derived from length).
I'd say it could be done, but I wouldn't be the ranch on a 14" twist doing it or not.
The rifle is a 1970's Remington 700 heavy barrel.I will have to check the twist. My main concern was if the bullet can handle the high velocity for more energy at longer ranges. Will try some and see what happens.
Quick way to check the twist, if you haven't got around to it already - remove the bolt, insert a cleaning rod from the muzzle to the magazine area, install the tip with patch, pull toward the muzzle till you feel it hit the rifling, mark the top dead center of the rod where it exits the muzzle, pull the rod out of the barrel slowly till the magic marker mark comes back around to top dead center and stop pulling the rod. Use a tape measure to measure from the muzzle to that mark you made = number of inches it takes to make a full turn.
I've read higher velocities (increases the rpm of the bullet, right) will help with longer bullets in slower twist barrels. The 22-250 may have enough velocity increase to get that longer bullet stabilized. Don't give up, try it.
Accuracy may be disappointing compared to good civilian hunting/target bullets though.